敷设橡胶圆板近场水下爆炸数值模拟

  目的   为了深入研究敷设覆盖层结构在近场水下爆炸作用下的响应特征，  方法   运用龙格库塔间断伽辽金法（RKDG）、边界元法（BEM）和有限元法（FEM）的耦合计算方法（RKDG-BEM-FEM），研究敷设橡胶圆板在近场水下爆炸载荷作用下的响应特征；通过与试验得到的湿表面压力、气泡形态等结果进行对比，验证计算方法的有效性，探讨近场水下爆炸气泡在柔性边界附近的响应特征。  结果   研究结果表明，敷设实心橡胶能够缩短冲击波的脉宽，但是更容易出现空化溃灭；敷设实心橡胶对近场水下爆炸气泡的变形影响不大。
  结论   研究成果可为舰艇抗冲击结构近场水下爆炸设计提供理论依据。

Effect of surface coatings on cylinders exposed to underwater shock

  Objectives   To study the coating effects on structures subjected to near-field underwater explosion,  Methods   the coupling Runge-Kutta Discontinuous Galerkin Method, Boundary Element Method and Finite Element Method are developed in this paper to solve a rubber coating circular plate subjected to near-field underwater explosion. The results are compared with experimentally obtained wet face pressure and bubble shape to verify the method, and the explosion bubble response to the flexible boundary is discussed.  Results   The results indicate that the rubber coating plate will shorten the pulse width of the shockwave, but the cavitation collapse will occur more easily.
In addition, solid rubber coating has little effect on the deformation of the explosion bubble.  Conclusions   This research can provide a theoretical basis and technical support for the coating design and optimization of warships subjected to near-field underwater explosion.